7WOODWARD P K,KENNEDY J,MEDERO G. Improving the Safety of the Railway Track Infrastructure using Insitu Polyurethane Geocomposites [R]. Scotland: Heriot-Watt University, 2009.
8ZHANG C X. A Polyurethane Railway Track Bed,a Preparing Method and the Usage Thereof.: Germany, EP 072930 [P].2012-08-04.
9WOODWARD P K, THOMPSON D, BANIMAHD M. Geocomposite Technology:Reducing the Railway Maintenance Cycle [J]. Transport Journal, 2007,160 ( 3 ) : 109-115.
10KENNEDY J. A Full-scalelaboratory Investigation into Railway Track Substructure Performance and Ballast Reinforcement [D]. Scotland : Heriot-Watt University ,2011.